1 It is important to keep your circulatory system working at its best. Your heart pumps blood to every part of your body. It travels through thousands of miles of blood vessels! Blood carries oxygen from your lungs. If there is a problem with your blood, your heart, or your blood vessels, your whole body can suffer. If you don't get enough oxygen to your brain, you might not be able to think clearly. If your stomach isn't getting enough oxygen, it might be hard for you to digest your food. If there is a problem with one of your blood vessels, blood could stop flowing to a part of your body. Without it, those cells could die.2 What can you do to keep your circulatory system healthy? You can make sure that you are getting plenty of exercise. When you exercise, you heart beats faster. This makes your heart stronger. Your heart is a muscle. Just like the muscles in your arms and legs, your heart gets bigger and stronger the more that you use it. Exercise also helps to keep your blood vessels working properly. Go outside and play! Ride your bicycle. Go for a swim. Your body will thank you!3.....For the complete story with questions: click here for printable